QPID-916 tag RC6

git-svn-id: https://svn.apache.org/repos/asf/incubator/qpid/tags/M2.1@648680 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 84 insertions, 0 deletions

diff --git a/RC6/cpp/lib/broker/Daemon.h b/RC6/cpp/lib/broker/Daemon.h
new file mode 100644
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+++ b/RC6/cpp/lib/broker/Daemon.h
@@ -0,0 +1,84 @@
+#ifndef _broker_Daemon_h
+#define _broker_Daemon_h
+
+/*
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ *
+ */
+
+#include <string>
+#include <boost/scoped_ptr.hpp>
+#include <boost/function.hpp>
+#include <boost/noncopyable.hpp>
+
+namespace qpid {
+namespace broker {
+
+/**
+ * Tools for forking and managing a daemon process.
+ * NB: Only one Daemon instance is allowed in a process.
+ */
+class Daemon : private boost::noncopyable
+{
+  public:
+    /** Check daemon is running on port, throw exception if not */
+    static pid_t getPid(uint16_t port);
+
+    Daemon();
+
+    virtual ~Daemon();
+
+    /**
+     * Fork a daemon process.
+     * Call parent() in the parent process, child() in the child.
+     */
+    void fork();
+
+  protected:
+
+    /** Called in parent process */
+    virtual void parent() = 0;
+
+    /** Called in child process */
+    virtual void child() = 0;
+
+    /** Call from parent(): wait for child to indicate it is ready.
+     * @timeout in seconds to wait for response.
+     * @return port passed by child to ready().
+     */
+    uint16_t wait(int timeout);
+
+    /** Call from child(): Notify the parent we are ready and write the
+     * PID file.
+     *@param port returned by parent call to wait().
+     */
+    void ready(uint16_t port);
+    
+  private:
+    static std::string dir();
+    static std::string pidFile(uint16_t port);
+
+    pid_t pid;
+    int pipeFds[2];
+    std::string lockFile;
+};
+
+}} // namespace qpid::broker
+
+#endif  /*!_broker_Daemon_h*/